↑Eugene L. Sierras, Mexican Census Pre-Territorial : Pimeria Alta, 1852 (Tucson, Arizona : Arizona State Genealogical Society, 1986)[FHL Book 979.1 X2se 1852]. Pimeria Alta was an area of land in southern pre-territorial Arizona. The census was conducted in 1852 in the district of Altar, Sonora.

↑Instituto Genealógico e Histórico Latinoamericano, Index to the 1831 Census of Arizona and Sonora (Highland, Utah: [Instituto], 1983)[FHL Book 979.1 A1 no. 87; Film 697282 Item 7]. The census includes Tucson, Tubac and Santa Cruz, as well as parts of Sonora, Mexico.